From left: Molly Biser, 3, Morgan Mihailovich, 5, Ava True, 2, Payton Clark, 4, and Breanna Bennett, 4, stand with children's librarian Liz Sell on Monday morning outside the main branch of the Allegany County Library System on Washington Street. The children planted a pink dogwood in honor of Arbor Day and read books about trees and their benefits